I'm presently listening to the "worst songs" thread right now so it's hard to concentrate LOLLL but I use a large box fan (available at your local drug store or wally-landings) in the spring/ summer.. they work great and I barely hear my alarm.. but still do.. they block out most annoying noises.
http://bandmix.com/zxyz/
http://www.myspace.com/zxyz1
http://www.myspace.com/zxyz1